Advertisements
Advertisements
प्रश्न
What is the difference between the food habits of organisms belonging to the first and the third trophic levels? Give one example each of the organisms belonging to these two trophic levels.
Advertisements
उत्तर
| First trophic level | Third trophic level |
| Producers belong to the first trophic level. | Carnivores belong to the third trophic level. |
| They prepare their own food by photosynthesis. | They consume the flesh of other animals. |
| Example: Green plants. |
Example: Lions.
|
APPEARS IN
संबंधित प्रश्न
Give reason to justify the following: Flow of energy in a food chain is unidirectional.
List two biotic components of a biosphere.
Which of the following constitute a food-chain?
Why are plants called producers?
Fill in the following blank with suitable word :
A series of organisms, each of which feeds on the next organism, the beginning of which is a green plant, is called a .............
Consider the food chain :
Grass → Deer → Lion
What will happen if all the lions are removed from the above food chain?
In a food chain, the initial organism is usually :
(a) photosynthetic
(b) herbivore
(c) saprophytic
(d) parasitic
Which of the following statement is incorrect?
One of the following is not a consumer. This one is :
(a) giraffe
(b) antelope
(c) algae
(d) alligator
The following statement is true or false:
Only 10 per cent of the light energy given by the sun is available for transfer at each higher trophic level in a food chain.
Name and state the law given by Lindeman which tells us how much energy entering a particular trophic level of organisms is available for trasnsfer to the next higher trophic level.
Which of the following limits the number of trophic levels in a food chain?
(a) insufficient food supply from producer level
(b) decrease in energy at higher trophic levels
(c) increase in the number of organisms at higher trophic levels
(d) accumulation of harmful chemicals at higher trophic levels
A food chain consists of fish, larvae, phytoplanktons and birds. The level of pesticides in water in which the fish, larvae and phytoplanktons live is quite high.
Write the food chain comprising all the organisms mentioned above.
Give one example of a food chain in an aquatic ecosystem?
What would happen if an organism is removed from the food chain?
Food chains are very important for the survival of most species.
If 10,000 J solar energy falls on green plants in a terrestrial ecosystem, what percentage of solar energy will be converted into food energy?
Which group of organisms are not constituents of a food chain?
- Grass, lion, rabbit, wolf
- Plankton, man, fish, grasshopper
- Wolf, grass, snake, tiger
- Frog, snake, eagle, grass, grasshopper
Study the picture given below showing three food chains (a), (b) and (c) and answer the following questions:
- Name the type of ecosystems that exist in food chains (b) and (c).
- The first trophic level in all food chains is producers. Why? What percentage of solar energy do these producers capture for their use?
- Why are the arrows shown in the diagram in one direction only and not vice versa? Justify.
In the food chain Grass → Insects → Thrush → Sparrow Hawk, where is most of the energy lost during the transfer from one trophic level to the next?
